Best answer by Keith N
Check out this helpful article that goes over the various ways to configure your Connect:Amp as surrounds. If you are using a Connect:Amp for surrounds, your Beam would need to either be wired to the network or directly to the Connect:Amp with an Ethernet cable.
If you are still having trouble, I'd recommend getting in contact with the support team directly. They can have a closer look in real-time to get this sorted. Thanks!